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                <h1>
                    Improve filter performance
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                <div><div class="section"><p>Some filter effects can be memory-intensive,
especially when applied to a high-resolution image. </p>
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<div class="p"><span><img src="images/dingbat.png" />&#160;You can do any of the following to improve performance:</span><ul><li><p>Try out filters and settings on a small
portion of an image.</p>
</li>
<li><p>Apply the effect to individual channels—for&#160;example,
to each RGB channel—if the image is large and you’re having problems
with insufficient memory. (With some filters, effects vary if applied
to the individual channel rather than the composite channel, especially
if the filter randomly modifies pixels.)</p>
</li>
<li><p>Free up memory before running the filter by using
the Purge command.</p>
</li>
<li><p>Allocate more RAM to Photoshop. If necessary, exit
other applications to make more memory available to Photoshop.</p>
</li>
<li><p>Try changing settings to improve the speed of memory-intensive
filters, such as Lighting Effects, Cutout, Stained Glass, Chrome,
Ripple, Spatter, Sprayed Strokes, and Glass filters. (For&#160;example,
with the Stained Glass filter, increase cell size. With&#160;the
Cutout filter, increase Edge Simplicity, decrease Edge Fidelity,
or both.)</p>
</li>
<li><p>If you plan to print to a grayscale printer, convert
a copy of the image to grayscale before applying filters. However,
applying a filter to a color image, and then converting to grayscale,
may not have the same effect as applying the filter to a grayscale
version of the image.</p>
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